#include <cstdio>
#include <iostream>

void add_int(int a) {
  printf("a=%d\n", a);
  a++;
  printf("a=%d\n", a);
}

int main(int argc, char *argv[]) {
  std::cout << "==== ch04 p05 ====" << std::endl;
  int original = 10;
  add_int(original);
  printf("original=%d\n", original);
  return 0;
}
